Their species distribution in ocean cores is often related to past sea surface temperatures. (climatehotmap.org)
Here are my comments to Chris Mooney on the article: Chris, The Snyder study uses a selection of ocean cores from the much greater number collected over the past several decades. (realclimate.org)
The past climates that forced these changes in ice volume and sea level were reconstructed mainly from temperature - sensitive measurements in ocean cores from around the globe, and from ice cores. (sciencedaily.com)